Home / 641,931.60-885,854.79-355,445.53

Finding the Fourth Proportional to 641,931.60, 885,854.79 and 355,445.53

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Solution

The fourth proportional to 641,931.60, 885,854.79 and 355,445.53 is: 490,508.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,931.60 : 885,854.79 = 355,445.53 : x
  2. Step 2: Convert to fraction form
    641,931.60/885,854.79 = 355,445.53/x
  3. Step 3: Cross multiply
    641,931.60x = 885,854.79 × 355,445.53
  4. Step 4: Simplify right side
    641,931.60x = 314,873,127,103.19
  5. Step 5: Solve for x
    x = 314,873,127,103.19/641,931.60
  6. Step 6: Final answer
    x = 490,508.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.